JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

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Application +4 | -1

x=\cos 15^{\circ}

, then which of the following is correct ?

View answer and explanation

Correct option: D

16 x^4-16 x^2+1=0

Option D (

16 x^4-16 x^2+1=0

) is correct because it is derived from the given condition

x = \cos 15^{\circ}

by algebraic manipulation.

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